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Diffstat (limited to 'library/core/src/slice/specialize.rs')
-rw-r--r-- | library/core/src/slice/specialize.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/library/core/src/slice/specialize.rs b/library/core/src/slice/specialize.rs new file mode 100644 index 000000000..80eb59058 --- /dev/null +++ b/library/core/src/slice/specialize.rs @@ -0,0 +1,23 @@ +pub(super) trait SpecFill<T> { + fn spec_fill(&mut self, value: T); +} + +impl<T: Clone> SpecFill<T> for [T] { + default fn spec_fill(&mut self, value: T) { + if let Some((last, elems)) = self.split_last_mut() { + for el in elems { + el.clone_from(&value); + } + + *last = value + } + } +} + +impl<T: Copy> SpecFill<T> for [T] { + fn spec_fill(&mut self, value: T) { + for item in self.iter_mut() { + *item = value; + } + } +} |